High-velocity oxygen-fuel and other finishing technologies are providing high-performance alternatives to engineered hard chrome in the aerospace industry. U.S. Environmental Protection Agency regulations for hexavalent chrome (Cr{sup}(6+)) air emissions (regulated under the Clean Air Act) have become increasingly stringent over the last few years. In addition, chrome plating sludge, used maskant, and any other material containing Cr (whether Cr, Cr{sup}(6+) or Cr{sup}(6+)) must be disposed of as toxic waste. The liability risks associated with air emissions, waste disposal and worker health are a major concern for any organization engaged in aerospace manufacturing or overhaul using engineered hard chrome (EHC).
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